Anti-tip trolley base



FIG. 1 is an illustration of a front, right side isometric view of an anti-tip trolley base;

FIG. 2 is an illustration of a front view of the anti-tip trolley base of FIG. 1 with the back view being a mirror image thereof;

FIG. 3 is an illustration of a right side view of the anti-tip trolley base of FIG. 1 with the left side view being a mirror image thereof; and,

FIG. 4 is an illustration of a top view of the anti-tip trolley base of FIG. 1 .

The broken lines shown in the drawings depict portions of the anti-tip trolley base that form no part of the claimed design. 

CLAIM The ornamental design for an anti-tip trolley base, as shown and described. 